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US5576453A
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Stable, sterically-protected, bonded phase silicas prepared from bifunctional silanes
Assignee: ES Industries Inc
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Filing: 1994-07-18
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Granted: 1996-11-19
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Expires: 2014-07-18
Abstract
Abstract Compositions of Formula (I): ##STR1## wherein R is a group selected in accordance with an intended application; R 1 and R 2 are protecting groups; and P is a substrate are provided. Methods of producing these compositions are also provided.
Inventors
- 👤 Mark A. Buese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:31
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/281; B01J20/286; B01J20/289; B01J20/29; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3206; B01J20/3208; B01J20/3214; B01J20/3217; B01J20/3219; B01J20/3231; B01J20/3242; B01J20/3244; B01J20/3246; B01J20/3257; B01J20/3259; B01J20/3261; B01J20/3289; B01J2220/00; B01J2220/50; B01J2220/54
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
49 words
A composition of Formula (I): ##STR7## wherein R is selected from a group consisting of an alkyl, substituted alkyl, alkenyl, substituted alkenyl, aryl and substituted aryl; R 1 and R 2 are sterically-protecting groups; and P is a hydrate metal oxide, a hydrated metalloid oxide, or an organic polymer.
Claim 2
Dependent Claim
49 words
A composition of Formula (I): ##STR7## wherein R is selected from a group consisting of an alkyl, substituted alkyl, alkenyl, substituted alkenyl, aryl and substituted aryl; R 1 and R 2 are sterically-protecting groups; and P is a hydrate metal oxide, a hydrated metalloid oxide, or an organic polymer.
Claim 3
Dependent Claim
26 words
A composition of claim 1 wherein: R 1 and R 2 are each selected from a group consisting of secondary alkyls, tertiary alkyls and cyclo alkyls.
Claim 4
Dependent Claim
14 words
The composition of claim 1 wherein R 1 and R 2 are the same.
Claim 5
Dependent Claim
13 words
The composition of claim 1 wherein R 1 and R 2 are different.
Claim 6
Dependent Claim
66 words
A method of synthesizing compositions of claim 1 comprising binding a bifunctional silane of Formula (II): ##STR8## wherein: X is a reactive group which is more reactive than the OR group of the silane; R is selected from a group consisting of an alkyl, substituted alkyl, alkenyl, substituted alkenyl, aryl and substituted aryl; and R 1 and R 2 are sterically-protecting groups, to a substrate P.
Claim 7
Dependent Claim
47 words
The method of claim 5 wherein: R 1 and R 2 are each selected from a group consisting of secondary alkyls, tertiary alkyls and cyclo alkyls; and X is selected from a group consisting of an amino, amido, enolate, chloro, bromo, iodo, alcohol sulfonyl and aryl sulfonyl.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-19 | 2000-05-20 | 2000-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-19 | 2004-05-20 | 2004-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-19 | 2008-05-20 | 2008-11-19 | $7700.00 | Window Closed / Lapsed |